- The TSX Composite closed at 35,874, up 1.08%, supported by broad North American equity gains and a powerful copper rally.
- Copper surged 2.82% to $6.6130/lb USD after China signalled accelerated infrastructure spending approvals, lifting TSX materials stocks.
- WTI crude fell 1.18% to $101.22/bbl on a surprise U.S. inventory build, making energy the TSX’s worst-performing sector Thursday.
- Canadian CPI for August (8:30 AM ET Friday) and overnight Chinese industrial data are the key catalysts to watch heading into the weekend.
TSX Wraps a Convincing Thursday Session
The TSX Composite Index closed at 35,874, up 1.08% on Thursday, September 17, 2026, mirroring broad gains across North American equities. The index traded in a constructive range throughout the session, with volume running above its 30-day average — a signal that institutional buyers, not just retail momentum, were behind the move. The S&P 500 finished up 1.14% at 7,638 and the NASDAQ surged 1.69% to 26,418, providing a supportive backdrop for Canadian equities.
Winners: Base Metals and Industrials Dominate
Copper was the story of the day, surging 2.82% to $6.6130/lb USD ($9.25/lb CAD) on a combination of tightening LME warehouse inventories and fresh stimulus signals out of China’s industrial sector. TSX-listed copper producers led the materials complex higher. Silver also had a standout session, gaining 2.37% to $65.81/oz USD ($92.10/oz CAD), outperforming gold on a day when industrial metals broadly attracted capital rotation.
Technology names on the TSX caught a tailwind from NASDAQ’s strong performance, with Canadian AI and semiconductor-adjacent plays posting outsized gains in sympathy with their U.S. peers. The energy sector, while dragged by crude weakness, saw natural gas-levered names hold firm, limiting broader index damage from oil’s retreat.
Losers: Oil Producers Feel the Pinch
WTI crude fell 1.18% to $101.22/bbl USD ($141.66/bbl CAD) and Brent dropped 1.61% to $104.13/bbl USD ($145.73/bbl CAD), after the U.S. Energy Information Administration reported a larger-than-expected build in domestic crude inventories. Canadian oil sands producers and integrated energy majors on the TSX faced headwinds, with the energy sub-index the day’s clear underperformer. Gold was essentially flat, slipping just 0.09% to $4,383.60/oz USD ($6,135.06/oz CAD) — senior gold producers traded sideways as bullion found little directional conviction.
The News That Moved the Market
Two catalysts drove Thursday’s session. First, China’s Ministry of Industry and Information Technology signalled accelerated approvals for infrastructure spending, triggering a reflex rally in copper and base metals globally — a development with direct read-through for TSX materials names. Second, stronger-than-expected U.S. jobless claims data (printing below consensus) reinforced the view that the North American labour market remains resilient, boosting risk appetite across the board and giving equities permission to extend their recent breakout.
Market Snapshot — September 17, 2026 Close
| Index / Asset | Level / Price | Change |
|---|---|---|
| TSX Composite | 35,874 | +1.08% |
| S&P 500 | 7,638 | +1.14% |
| NASDAQ | 26,418 | +1.69% |
| Gold (USD/oz) | $4,383.60 | -0.09% |
| Silver (USD/oz) | $65.81 | +2.37% |
| WTI Crude (USD/bbl) | $101.22 | -1.18% |
| Copper (USD/lb) | $6.6130 | +2.82% |
| USD/CAD | 1.3995 | — |
What to Watch Friday, September 18
Canadian CPI data for August drops at 8:30 AM ET — the single most important domestic data point of the week. A hotter-than-expected print could reignite Bank of Canada rate-hold speculation and weigh on rate-sensitive REITs and utilities on the TSX. Overnight, watch Chinese industrial production figures due before the North American open; given copper’s outsized move today, any miss could trigger a sharp reversal in base metals names at Friday’s open. On the earnings calendar, a mid-cap Canadian energy services company reports before the bell — guidance language on oil field activity will be closely parsed given today’s crude weakness. Finally, with the USD/CAD holding at 1.3995, loonie traders will be watching whether Friday’s data tips the pair through the psychologically significant 1.40 level.
